Math problem hi

Question

If an object is dropped from a height of h

 meters and hits the ground in t

 seconds, then =th4.9

. Suppose that an object is dropped from the top of a building that is 474.32

 meters tall. How long does it take to hit the ground?

Answer 1

h(t)=-4.9t^2 +474.32=0

t= sqr(474.32/4.9)

=about 9.8387 seconds